ball bearings

Replacing the doors on my defender for the lift handle type.

Issue is on the inside of the lock barrels are two small ball bearing that seem to be required for the lock barrel to work. I think they are about 1mm in diameter but don't know exact size as they have gone missing.

Don't suppose anyone has a few ball bearings of different sizes around this size they could send me?

Happy to pay

given the doors age they are likely to be imperial sizes but not sure of exact size. Thanks in advance